CN2633702Y - Electric booster turning mechanism for vehicle - Google Patents
Electric booster turning mechanism for vehicle Download PDFInfo
- Publication number
- CN2633702Y CN2633702Y CN 03247079 CN03247079U CN2633702Y CN 2633702 Y CN2633702 Y CN 2633702Y CN 03247079 CN03247079 CN 03247079 CN 03247079 U CN03247079 U CN 03247079U CN 2633702 Y CN2633702 Y CN 2633702Y
- Authority
- CN
- China
- Prior art keywords
- signal
- torque
- motor
- steering
- vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Power Steering Mechanism (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
Abstract
The utility model discloses an electric booster turning mechanism for vehicle, comprising a steering gear which is connected to a gear shaft, a steering shaft which is connected to a steering device, a motor, a torque master, and a controller. The motor enforce the steering torque on the steering shaft via reducing mechanism, torque master is connected to the steering shaft and transmit the temperature inspection signal, main signal, safety signal to the controller. The utility model is of high efficiency, less energy consumption, good system road feeling and returnability, safety, reliability and environment friendly.
Description
Technical field
The utility model relates to a kind of electric power steering mechanism of vehicle.
Background technology
From nineteen fifty-three General Motors Coporation since in batches using hydraulic power-assist steering system first on Cadillac and the Buick car, laborsaving, the steerable advantage of hydraulic power-assist steering system is subjected to people and more and more welcomes.Hydraulic power-assist steering system almost becomes the standard facility of car that developed country sells now.Though being considered to one, hydraulic power-assisted steering is close to perfect technology, but because its intrinsic defective makes this steering swivel system have the following shortcoming that can't overcome: the pipeline of hydraulic efficiency pressure system is too much, makes linear loss, bend loss bigger, thereby make system effectiveness low, energy consumption is big; Hydraulic efficiency pressure system has hysteresis quality, and system's road feel is poor, and returnability is poor; The power-assisted energy of hydraulic power-assist steering system is provided by oil pump by driving engine, when engine off or rotating speed are low, can not fully drive the enough energy of oil pump output, makes steering swivel system that enough power can't be provided, thereby turns to difficulty takes place; The actuating force characteristic is single.
The electric-controlled hydraulic servo steering system of the Chu Xianing computing machine and the electron controls technology that will grow up in recent years combines with hydraulic booster system subsequently, and motor turning is controlled in real time.Adopt this scheme, only need in original hydraulic power-assist steering system, to set up bearing circle torque sensor, car speed sensor and control setup and just can obtain preferable actuating force characteristic.But because the technical innovation of this system is to carry out on the basis of hydraulic power-assist steering system, can't eradicate the inherent defect of hydraulic power-assist steering system at aspects such as system layout, installation, leak tightness, control sensitivity, expenditure of energy, wearing and tearing, especially there is very big deficiency at aspects such as energy-saving and environmental protection, therefore just makes the performance of hydraulic power-assisted steering obtain local improvement.
Summary of the invention
The purpose of this utility model provides the electric power steering mechanism of a kind of system effectiveness height, energy consumption is low, road feel is good vehicle.
In order to achieve the above object, the electric steering mechanism of vehicle of the present utility model comprises and deflector of wheel hub bonded assembly and the steering shaft that is attached thereto, also comprises:
One motor;
One torque sensor is applied to torque on the steering handwheel in order to detection;
And a controller, gather steering-wheel torque signal, vehicle speed signal and torque signal differential, and carry out exporting auxiliary current after the operational analysis according to these signals,
Wherein, described motor will turn to assist torque to be applied on the steering shaft by speed reduction gearing; Described torque sensor is connected in steering shaft, and temperature detection signal, main signal, safety signal are delivered to controller.
Described torque sensor is a photoelectricity non-contact torque sensing device.
Described motor is a brush direct current motor, and slowing down to increase by worm gear-endless screw will turn to assist torque to be applied to steering shaft after turning round.
Described controller comprises a power plant module and a driver module, described driver module comprises H bridge loop and driving circuit, safety relay and driving circuit thereof and the current sensor that high-power field effect transister is formed, can control the output torque of motor, according to signal, motor is carried out linear PWM control from Single Chip Microcomputer (SCM) system.
The electric power steering mechanism of vehicle of the present utility model, provide power-assisted by permanent magnet DC motor, driver assistance person finishes steering procedure, has following beneficial effect: (1) system effectiveness height, because adopt machinery and electric connecting mode, system effectiveness can be up to 80%; (2) consuming little energy, hydraulic power-assist steering system needs to make the additional fuel oil consumption of driving engine increase by 3% to the boost pump outputting power at any time, and the utility model only when bearing circle rotates just starter motor produce power torque, make additional fuel consumption only increase by 0.5%; (3) system's " road feel " is good, because adopting, the utility model inside is rigidly connected, and the system stiffness height, and system performance can be controlled the better road feel of easy acquisition when turning to by software; (4) system's returnability is good, and the utility model is more simple in structure than hydraulic power-assist steering system, and internal resistance is little, and returnability is good; (5) system is the energy with the battery, is dynamical element with the motor, as long as which kind of mode of operation no matter the battery electric quantity abundance start to be in, all can produce power-assisted, and driving engine can not cause under flame-out or low speed situation yet and turn to difficulty; (6) safe and reliable, when the motor work-saving device lost efficacy, can transfer mechanical type immediately to and turn to, have safety preferably; (7) environmental protection does not have expendable oil pipe, hydraulic oil and rubber in the utility model, do not have the oil liquid leakage problem yet, and environmental pollution is little; (8) the utility model uses components and parts few, and arrangement convenience is in light weight.
Description of drawings
Fig. 1 is the electric steering mechanism structural representation of the utility model vehicle.
Fig. 2 is the utility model photoelectricity non-contact torque sensing device parts connection diagrams.
Fig. 3 is the utility model photoelectricity non-contact torque sensing device structural representation.
Fig. 4 is the utility model photoelectricity non-contact torque sensing device output characteristics figure.
Fig. 5 is the utility model controller principle sketch.
Fig. 6 is the utility model controller drives cell schematics.
Fig. 7 is the utility model controller diagram of circuit.
Fig. 8 is that the utility model carries out software torque failure limit characteristic figure.
The specific embodiment
Electric steering mechanism as shown in Figure 1 is equipped with an electrical motor 1 that is fixed on the steering shaft, to turn to assist torque to be applied on the steering shaft 8 by turbine and worm decelerator, steering shaft 8 is passed to left and right sides front-wheel to rotating operation by mechanical gear rack-type steering gear 5 again, implements assisted diversion.Electrical motor 1 is a permanent-magnet DC brush motor, and its oad cooperates installation with the housing oad.Torque sensor 3 is installed on the steering shaft, detects the dtc signal on the steering handwheel and is transferred to controller 2 by electric wire, and vehicle speed signal can directly be adopted from the car speed sensor on the instrument 4.Controller can be fixed on different positions according to different automobile types, and each mechanism links to each other by wire harness and other.
As shown in Figure 2, described torque sensor is by photoelectron emission device 34 and receiving device 31, converts the deformation angle at torsion bar 36 two ends to satisfactory current signal, through after the differential amplification, converts collectable voltage signal to.The utility model adopts single-orifice type photoelectricity non-contact torque sensing device, its structural representation as shown in Figure 3, leaded light dish 32 and transparent plate 33 are individually fixed in the torsion bar two ends, and its both sides are equipped with feedway 34 and two receiving devices 31 (photoemissive element) stem for stem respectively.Torsion bar distortion causes that relatively rotating between leaded light dish 32 and the transparent plate 33 cause two photoemissive elements light-receiving area separately to change, and the characteristic of utilizing photoemissive element output voltage, electric current to change with its light-receiving area is converted to electric signal with the deformation of torsion bar.Because therefore the nonlinear characteristic of photoemissive element output voltage adopts its outgoing current as signal source.By the torque sensor rating test, obtain the output characteristic of bearing circle torque sensor as shown in Figure 4.Steering handwheel is output as 2.5V when midway location, the turning clockwise steering handwheel, and when load increased, torque sensor can increase to 4V (end position of torsion bar torsional deflection), the steering handwheel that turns left, when load increased, the output of torque sensor was reduced to 1V.
Vehicle electric force aid system controller is divided into two parts, wherein a part is a control module, another part be driver module as shown in Figure 5, the function of controller is to gather the signal of steering-wheel torque sensor, feedback current sensor and car speed sensor, and according to these signals by logic analysis with calculate after, issue instructions in the driver module with the control machine operation.In addition, it also has safety protection function, can carry out safety guard-safeguard to system, to guarantee under unexpected situation, does not make controller send false command.Micro controller system judges by gathering signals such as bearing circle torque, current of electric, battery tension, radiator temperature whether the working condition of its system is normal, in case system exception, major and minor safety relay will disconnect, and power-assisted is cancelled immediately; Simultaneously, the flicker of micro controller system fault-indicating lamp sounds a warning.
The core of driver module is a H type pwm power change-over circuit, adopts four high-power field effect transisters (MOSFET) to form, as shown in Figure 6.Circuit for power conversion accepts to be undertaken by the driving circuit signal of control unit control the action of conducting or shutoff.Circuit for power conversion is controlled itself and being communicated with of power supply, motor by two relays, and the assurance system cuts off the electricity supply when not working and cuts off motor and power supply is directly got in touch when emergency protection, and offers the power supply that the various change-over circuits of power unit are used.The control signal of relay is also provided by control unit by driving circuit.Motor puts on power torque on the steering column by retarder.Current sensor senses flows through the electric current of armature and detection signal is fed back to control unit carries out current closed-loop control.
The controller drives module can be controlled the output torque of motor, according to the signal from Single Chip Microcomputer (SCM) system, can carry out linear PWM control to motor.Driver module mainly is made up of H bridge loop and driving circuit, major-minor safety relay and driving circuit, fault-indicating lamp and driving circuit and current sensor etc. that 4 N type MOSFET pipes are formed, as shown in Figure 6.When torque sensor tells that the EPS controller need carry out power steering, controller just signals to the MOSFET tube drive circuit in the power plant module, driving circuit will provide a series of pwm voltage signals to motor, comprising the information of great power-assisted of needs and power-assisted direction.The pulse duration modulation of so-called voltage just is meant a string impulse singla with fixed frequency, and their dutycycle is a variable, for each cycle, signal is arranged for some time all, and a period of time does not have signal.Give an example, if there is the time of signal to account for 40%, do not have the time of signal to account for 60%, the electric current of the motor of flowing through is just less, and the power-assisted of rotating speed of motor and generation is also less; Time as signal accounts for 60%, does not have the time of signal to account for 40%, and the electric current of the motor of flowing through is just bigger, and the power-assisted of rotating speed of motor and generation will increase.We control the electric bridge that 4 field effect transistor are formed with field effect commutation driving circuit, provide corresponding power-assisted electric current and direction to produce suitable power-assisted to assist motor, the state of each MOSFET pipe in the H bridge circuit under the normal power operated control that sees the following form.
| Wheel steering | MOSFET (a) | MOSFET (b) | MOSFET (c) | MOSFET (d) | Motor status |
| Turn left | End | Conducting | End | PWM | Turn left |
| Turn right | Conducting | End | PWM | End | Turn right |
| Midway location | End | End | End | End | Stop |
Under electronic mode, as shown in Figure 6, a pipe (or b pipe) is in conducting state all the time, simultaneously d pipe (c pipe) by the pwm signal Control work on off state.When pwm signal indication transistor turns, electric current through a pipe (or the b pipe) motor of flowing through, flows back to battery negative post by d pipe (c pipe) from B+ again.When pwm signal indication transistor was judged, via motor, the reversal connection diode by b pipe (or a pipe) was split into C/LOOP and carries out afterflow electric current from a pipe (or b pipe).Under brake mode, a, b two pipes are in off state all the time, c, d two pipes by same pwm signal Control work on off state.When the conducting of c, d pipe, armature two terminal shortcircuits.
In driver module, flow through the size and Orientation of current of electric with a Hall current sensor measurement, participate in the power operated control computing.When assist motor is worked, the electric current current sensor of also flowing through, feedback voltage signal of current sensor output is given the EPS controller.If current of electric has exceeded the predetermined value of motor normal operation, controller will signal to the driving circuit of power plant module, reduces electric current and prevents that motor overload from damaging.If bearing circle has forwarded head to towards a direction, and keep this position, the electric current of assist motor will significantly increase, at this moment current sensor will signal to the EPS controller reduce electric current with the protection motor.
The utility model adopts the closed loop current feedback, utilize the difference of target current and feedback current to carry out the PID computing after, deliver to the controller drives unit and carry out the electric current of motor and the control of direction.What torque sensor adopted is the photoelectricity noncontacting proximity sensor, and what current sensor adopted is the Hall type current sensor, and target current is to obtain according to torque sensor and speed of a motor vehicle difference power-assisted form.
In the steering procedure, the speed of a motor vehicle of vehicle and bearing circle torque variation range are very big, according to different steering states, have formulated different master modes and control method on control algorithm.Control algorithm quick and precisely satisfies the requirement of control in real time, the assist characteristic that can realize ideal effectively and control law.The chip of controller adopts 8 Motorola micro controller systems, and arithmetic speed can satisfy the control program requirement of response fast, can accomplish to finish in 2 milliseconds complete program loop.
When ignition lock was delivered to the micro controller system input port with impulse singla, control program began self check, checked that torque sensor output signal, vehicle speed signal and battery tension signal are whether in normal range.If above-mentioned signal is normal, control program brings into operation, the safety relay closure, and controller enters mode of operation.Control unit carries out the control algorithm computing according to dtc signal, vehicle speed signal and feedback current signal at this moment, provides rational electric machine control direction and electric current, shown in program circuit Fig. 7.For the restriction current of electric exceeds the scope of operation, on Control Software, carry out corresponding limit algorithm, exceed predetermined scope with the restriction electric current.Dtc signal is as main control source signal; must carry out necessary emergency protection to it; safety precautions on the torque sensor hardware circuit; can guarantee that its output valve is protected it, as shown in Figure 8 simultaneously at the midway location of steering handwheel when break down in sensor signal emission and test section in software; when guaranteeing on connection line, to break down; be unlikely to make software to carry out wrong computing, the result of output error causes the danger in the vehicle driving process.
Control Software is calculated to judge according to torque sensor signal and feedback current signal and feedback current signal and is carried out power-assisted or braking mode.Adopting the four-quadrant method to judge, if the value of electric moter voltage of extrapolating and electric current is to be assistant mode at first quartile or third quadrant, is braking mode when second quadrant or four-quadrant.
Claims (4)
1, a kind of electric power steering mechanism of vehicle comprises with wheel hub bonded assembly deflector (5) reaching and deflector (5) bonded assembly steering shaft (8), it is characterized in that also comprising:
One motor (1);
One torque sensor (3) is applied to torque on the steering handwheel in order to detection;
And a controller (2), gather steering-wheel torque signal, vehicle speed signal and torque signal differential, and carry out exporting auxiliary current with the control machine operation after the operational analysis according to these signals,
Wherein, described motor (1) will turn to assist torque to be applied on the steering shaft (8) by speed reduction gearing; Described torque sensor (3) is connected in steering shaft (8), and temperature detection signal, main signal, safety signal are delivered to controller (2).
2, the electric power steering mechanism of the described vehicle of claim 1 is characterized in that described torque sensor (3) is a photoelectricity non-contact torque sensing device.
3, the electric power steering mechanism of the described vehicle of claim 1 is characterized in that described motor is a DC machine, and slowing down to increase by worm gear-endless screw speed reduction gearing (7) will turn to assist torque to be applied to steering shaft (8) after turning round.
4, the electric power steering mechanism of the described vehicle of claim 1, it is characterized in that described controller (2) comprises a control module and a driver module, described driver module comprises H bridge loop and driving circuit, safety relay and driving circuit thereof and the current sensor that high-power field effect transister is formed, can control the output torque of motor, according to signal, motor is carried out linear PWM control from Single Chip Microcomputer (SCM) system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03247079 CN2633702Y (en) | 2003-06-10 | 2003-06-10 | Electric booster turning mechanism for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03247079 CN2633702Y (en) | 2003-06-10 | 2003-06-10 | Electric booster turning mechanism for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2633702Y true CN2633702Y (en) | 2004-08-18 |
Family
ID=34292718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03247079 Expired - Fee Related CN2633702Y (en) | 2003-06-10 | 2003-06-10 | Electric booster turning mechanism for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2633702Y (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100398373C (en) * | 2005-03-17 | 2008-07-02 | 北京理工大学 | Circular ball type electric booster steering device |
| CN100463827C (en) * | 2004-12-04 | 2009-02-25 | 浙江福林国润汽车零部件有限公司 | Automobile electric booster sterring system and its treating method for rotary shaft |
| CN101081626B (en) * | 2007-05-24 | 2011-04-20 | 上海交大神舟汽车设计开发有限公司 | Automobile electric power-assisted steering controlling method and apparatus thereof |
| CN101663193B (en) * | 2007-06-13 | 2012-05-30 | 日本精工株式会社 | Electric power steering apparatus |
| CN102795260A (en) * | 2011-05-23 | 2012-11-28 | 现代摩比斯株式会社 | Output control method for electric steering system |
| CN102837732A (en) * | 2012-08-30 | 2012-12-26 | 浙江诺力机械股份有限公司 | Electric steering control device and method for walking type electric industrial vehicle |
| CN101590872B (en) * | 2008-05-30 | 2013-03-06 | 现代自动车株式会社 | Motor-driven power steering system |
| CN103717477A (en) * | 2011-06-10 | 2014-04-09 | 罗伯特·博世有限公司 | Steering system in a vehicle |
| CN103921840A (en) * | 2014-05-03 | 2014-07-16 | 顾志强 | Double-input-end ball-nut type steering gear |
| CN104210487A (en) * | 2014-09-16 | 2014-12-17 | 成都衔石科技有限公司 | Power-assisted steering following vehicle |
| CN104228933A (en) * | 2014-09-16 | 2014-12-24 | 成都衔石科技有限公司 | Following automobile with power-assisted steering function |
| CN107200058A (en) * | 2016-03-18 | 2017-09-26 | 福特全球科技有限责任公司 | For the steering for the vehicle that can be turned to |
| CN107635465A (en) * | 2015-03-19 | 2018-01-26 | 美敦力导航股份有限公司 | Axle to weighing apparatus x-ray scan instrument stand and the device and method for maintaining user's selection position of x-ray scan instrument stand |
-
2003
- 2003-06-10 CN CN 03247079 patent/CN2633702Y/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463827C (en) * | 2004-12-04 | 2009-02-25 | 浙江福林国润汽车零部件有限公司 | Automobile electric booster sterring system and its treating method for rotary shaft |
| CN100398373C (en) * | 2005-03-17 | 2008-07-02 | 北京理工大学 | Circular ball type electric booster steering device |
| CN101081626B (en) * | 2007-05-24 | 2011-04-20 | 上海交大神舟汽车设计开发有限公司 | Automobile electric power-assisted steering controlling method and apparatus thereof |
| CN101663193B (en) * | 2007-06-13 | 2012-05-30 | 日本精工株式会社 | Electric power steering apparatus |
| CN101590872B (en) * | 2008-05-30 | 2013-03-06 | 现代自动车株式会社 | Motor-driven power steering system |
| CN102795260A (en) * | 2011-05-23 | 2012-11-28 | 现代摩比斯株式会社 | Output control method for electric steering system |
| CN103717477A (en) * | 2011-06-10 | 2014-04-09 | 罗伯特·博世有限公司 | Steering system in a vehicle |
| CN103717477B (en) * | 2011-06-10 | 2016-10-19 | 罗伯特·博世有限公司 | Steering in vehicle |
| CN102837732A (en) * | 2012-08-30 | 2012-12-26 | 浙江诺力机械股份有限公司 | Electric steering control device and method for walking type electric industrial vehicle |
| CN103921840A (en) * | 2014-05-03 | 2014-07-16 | 顾志强 | Double-input-end ball-nut type steering gear |
| CN104210487A (en) * | 2014-09-16 | 2014-12-17 | 成都衔石科技有限公司 | Power-assisted steering following vehicle |
| CN104228933A (en) * | 2014-09-16 | 2014-12-24 | 成都衔石科技有限公司 | Following automobile with power-assisted steering function |
| CN107635465A (en) * | 2015-03-19 | 2018-01-26 | 美敦力导航股份有限公司 | Axle to weighing apparatus x-ray scan instrument stand and the device and method for maintaining user's selection position of x-ray scan instrument stand |
| CN107635465B (en) * | 2015-03-19 | 2021-07-13 | 美敦力导航股份有限公司 | Apparatus and method for counterbalancing an axis of an x-ray scanner gantry and maintaining a user-selected position of the x-ray scanner gantry |
| CN107200058A (en) * | 2016-03-18 | 2017-09-26 | 福特全球科技有限责任公司 | For the steering for the vehicle that can be turned to |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2633702Y (en) | Electric booster turning mechanism for vehicle | |
| WO2021022863A1 (en) | Drive-by-wire electro-hydraulic steering system and hybrid control method for dual-winding motor | |
| CN107792168B (en) | Sleeve motor steer-by-wire device and control method | |
| EP1384650B1 (en) | Vehicle steering control system | |
| CN103738395A (en) | New-energy bus electronically-controlled hydraulic-powered steering control system and control method thereof | |
| CN2803861Y (en) | Electric boosting steering system | |
| CN104401388A (en) | Intelligent electro-hydraulic steering system | |
| CN103153757A (en) | Electric power steering | |
| CN103112491A (en) | Electric power steering control system for electric automobiles, device and method therefore | |
| CN211995537U (en) | Electric control brake power assisting system with redundant modules | |
| CN110962919B (en) | Active electrohydraulic coupling steering system and vehicle | |
| CN201580431U (en) | Electric control and electric four-wheeled steering (4WS) device of electric vehicle | |
| CN216185449U (en) | A drive-by-wire a steering system for heavy commercial car | |
| CN106741132B (en) | Controller of multi-mode active steering system and control method thereof | |
| CN113928412B (en) | Electro-hydraulic composite steering system and electro-hydraulic decoupling control method | |
| CN113815721A (en) | A drive-by-wire a steering system for heavy commercial car | |
| CN108860305A (en) | A kind of EPS of oversize vehicle | |
| CN100428620C (en) | Vehicle electric booster steering system controller | |
| CN106740791B (en) | electric servo brake device of electric automobile | |
| CN108945097B (en) | Electric wire control steering system | |
| CN208278156U (en) | A kind of double source electric boosting steering system | |
| CN206589955U (en) | A kind of solenoid-operated hydraulic booster type steering | |
| CN100492867C (en) | Coutrol device for electric booster steering system | |
| CN201086737Y (en) | Vehicle steering servo-controlled system | |
| CN108375480A (en) | A kind of car conversion system testing table |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |